JPH0191680A - Motor - Google Patents

Abstract

PURPOSE:To rotate a device with less current, by switching one of superconducting elements at least, to a superconducting state or a normal conducting state, accommodated to the rotational position of a rotary magnet. CONSTITUTION:Between the stationary magnet 1 of 8 poles and the rotary magnet 3 of 12 poles, a magnetic field switching unit 2 having 8 superconducting elements 5a-5d is set. The elements 5a, 5c are confronted with the poles S of the stationary magnet 1, and the elements 5b, 5d are confronted with the poles N, respectively. First, when current equal to or more than critical current is permitted to flow to the elements 5a and is set to be normally conductive, then the poles S of the stationary magnet 1 and the poles N of the rotary magnet 3 are attracted to each other. After that, when current conduction to the elements 5a is stopped and the current equal to or more than the critical current is permitted to flow to the element 5b and is set to be normally conductive, then the rotary magnet 3 is moved to the left of a figure. In this manner, conduction to the elements 5a-5d is switched, and the rotary magnet 3 is rotated. Current necessary for rotation is acceptable if it is equal to or more than the critical current, and a device can be rotated with the slight current of several mu A or less.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an electric motor formed of a magnet and a superconducting element.

Conventional technology Traditionally, electric motors are composed of magnets and coils.
By passing current through the coil, torque is generated, which causes the motor to rotate.

Problems to be Solved by the Invention In such a conventional configuration, it is necessary to pass current through the coil in order to rotate the motor, and it is difficult to achieve low current consumption.

The present invention aims to solve the above-mentioned problems, and aims to provide an electric motor that can rotate with a small amount of current.

Means for Solving the Problems In the present invention, a fixed magnet with a number of magnetized poles and a rotating magnet with a number of magnetized poles are arranged facing each other. A magnetic field switching body composed of a plurality of superconducting elements is arranged between a fixed magnet and a rotating magnet, and at least one of the superconducting elements is switched to a superconducting state or a normal conducting state in accordance with the rotational position of the rotating magnet. This electric motor is characterized by being able to switch between 9 and 9 times.

According to the present invention, with the above-described configuration, the motor can be rotated by passing a minute current through the superconducting element only when the superconducting element is in a normal conducting state, and a motor with low current consumption can be realized.

Embodiment FIG. 1 shows members constituting an electric motor according to an embodiment of the present invention. FIG. 1a shows a fixed magnet 1 magnetized into eight poles. The figure shows a magnetic field switching body 2 comprising eight superconducting elements 6a to 6d.

Figure C shows a rotating magnet magnetized to 12 poles.

The fixed magnet 1, the magnetic field switching body 2, and the rotating magnet 3 are arranged as shown in FIG. 2a. That is, the fixed magnet 1, the magnetic field switching body 2, and the rotating magnet 3 are arranged in this order so as to face each other.

Further, the superconducting elements 5&, 50 are opposed to the S pole of the fixed magnet 1, and the superconducting elements 5b, 5d are opposite to the S pole of the fixed magnet 1.
It is arranged so as to face the N pole of. The magnetic field switching body 2 consists of a superconducting member 4 and superconducting elements 6a to 6d. The superconducting elements 6a to 6d usually have superconducting properties and do not allow magnetic fields to pass through them (Meissner effect). On the other hand, when a current higher than the critical current Ia is applied, the superconducting elements 5a to 6d do not lose their superconducting properties, but become normal conductors and pass a magnetic field.

The operation of rotating the rotating magnet using this characteristic will be explained using FIG. 2. As mentioned above, the fixed magnet 1 and the rotating magnet 3 are arranged facing each other, and the magnetic field switching body 2 is provided between the fixed magnet 1 and the rotating magnet 3.
are arranged. The superconducting elements 6a to 6d are energized depending on the rotational position of the rotating magnet 3. First, when a current equal to or higher than the critical current I& is applied to the superconducting element 6a to make it normal conductive, the S pole of the fixed magnet 1 and the N pole of the rotating magnet 3 attract each other, resulting in a positional relationship as shown in FIG. 2a. Next, when the power supply to the superconducting element 6a is stopped and a current higher than the critical current Ia is applied to the superconducting element 6b, the superconducting element 6b becomes normal conductive, and therefore the rotational position of the rotating magnet 3 is changed as shown in FIG. Become. Next, when the superconducting element 5b-\ is de-energized and a current equal to or higher than the critical current is passed through the superconducting element 6o, the superconducting element 6c becomes normal conductive, and therefore the rotational position of the rotating magnet 3 is set to C in Fig. 2. It becomes as shown in . Next, when the power supply to the superconducting element 6c is stopped and a current equal to or higher than the critical current Ia is passed through the superconducting element 6d, the superconducting element 6d becomes normal conductive, and therefore, the rotational position of the rotating magnet 3 is shown in FIG. 2d. It becomes like this.

As explained above, the rotating magnet 3 can be rotated by switching the energization to the superconducting elements 6 & ~ 6d and switching between the superconducting state and the normal conducting state in accordance with the rotational position of the rotating magnet 3. .

At this time, the current required to rotate the rotating magnet 3 may be greater than or equal to the critical current Ia, and rotation can be achieved with a minute current of several microangstroms or less.

As described in detail, the present invention has the advantage that it is possible to realize the rotation of the electric motor with a small amount of current consumption.

[Brief explanation of the drawing]

FIG. 1 is a plan view of members constituting an electric motor according to an embodiment of the present invention, and FIG. 2 is an auxiliary diagram for explaining the operation of the electric motor according to the present invention. 1... Fixed magnet, 2... Magnetic field switching body, 3... Rotating magnet, 5J 5b, 5
0,5d... River superconducting element.

Claims (2)

[Claims] (1) A fixed magnet with a number of magnetized poles K and a rotating magnet with a number of magnetized poles L are arranged to face each other, and a magnetic field switching body made of a plurality of superconducting elements is arranged between the fixed magnet and the rotating magnet. An electric motor characterized in that at least one of the superconducting elements is switched to a superconducting state or a normal conducting state in accordance with the rotational position of the rotating magnet. (2) The electric motor according to claim 1, wherein the relationship between the number K of magnetized poles of the fixed magnet and the number L of magnetized poles of the rotating magnet is (K:L)=(2:3).